Backwash filter is a filter that directly intercepts impurities in water, removes suspended matter and particulate matter from water, reduces turbidity, purifies water quality, reduces system dirt, bacteria and algae, and rust, etc., to purify water and protect other equipment of the system. Normal working precision equipment. Water enters the self-cleaning filter body through the water inlet. Due to the intelligent (PLC, PAC) design, the system can automatically identify the degree of impurity deposition and automatically discharge the sewage valve signal.
The automatic back flushing filter overcomes many shortcomings such as small amount of pollutants in the conventional filtration products, easy to be blocked by dirt, and the filter part needs to be disassembled and cleaned, and cannot monitor the state of the filter, etc., and has the function of filtering the raw water and automatically performing automatic cleaning and sewage discharging on the filter element. The function, and the uninterrupted water supply of the system when cleaning the sewage, can monitor the working status of the filter, the degree of automation is high. Covers the needs of various filtration precisions from 10um to 3000um, providing customers with a variety of water filtration equipment.
The automatic backwash filter enables industrial wastewater to meet the national wastewater discharge standards, which can effectively protect the environment. At the same time, it can also treat the wastewater to a standard that can be reused, which not only solves the problem of sewage discharge, Can also realize re-use to save costs, automatic backwash filter is a direct use of filter to intercept impurities in water, remove water suspended solids, particulate matter, reduce turbidity, purify water, reduce system dirt, algae, corrosion, etc. To improve the water quality and protect the normal operation of other equipment.
Backwash filter, operation and control without any external energy can automatically clean filter, automatic sewage. During continuous flow during backwashing, the cleaning and filtration cycle can be adjusted. The default cleaning filtration time is 10-60/s. The loss of cleaning and filtering water accounts for only 0.08-0.6% of the filtered water volume; the filtration accuracy can reach 10-3000 microns; the working pressure can reach 1.0-1.6Mpa; single station flow: 4-4160m3/h.
The backwash filter can be installed in any position, vertical, horizontal or inverted. It can be used in industrial, agricultural, municipal power, electronics, medicine, food, printing and dyeing, construction, steel, metallurgy, papermaking and other industries.
The automatic backwash filter can be used for filtration of light industrial waste water and circulating water in industrial water, seawater, food, and pharmaceuticals, as well as filtration treatment of emulsion regeneration, waste oil, and liquid raw materials. In the processes of metallurgical and petrochemical industries and power plants, such as water supply and drainage and circulating water systems and medium filtration related to liquids, the use of automatic backwash filters has become increasingly widespread. China’s modern metallurgical companies have introduced continuous casting water systems, blast furnace water systems, High-pressure water descaling systems for hot rolling, emulsion systems, and closed water circulation systems, and liquid medium filtration systems all employ a large number of automatic backwash filters.
Backwash filter work principle:
Water enters through the inlet and first passes through the coarse filter to filter out larger particles of impurities and then reaches the fine filter. During the filtration process, the fine filter gradually accumulates dirt and impurities in the water and forms a filter impurity layer. Since the impurity layer accumulates on the inner side of the fine filter, a pressure difference is formed on the inner and outer sides of the fine filter. .
When the pressure difference of the filter reaches the preset value, the automatic cleaning process will start. During this period, the continuous supply of purified water will continue, the cleaning valve will open, the pressure in the cleaning chamber and the suction device will drop drastically, and the pressure of the filter cartridge and the suction pipe will decrease. The pressure difference between the suction pipe and the cleaning chamber generates a suction force through the suction nozzle to form a suction process. At the same time, the electric motor drives the suction pipe to make a spiral movement in the axial direction. The combination of the axial movement and the rotary movement of the dirt sucker completely cleans the entire inner surface of the filter. The entire flushing process takes only tens of seconds. The drain valve closes at the end of the cleaning. The filter starts to prepare for the next flush cycle.
Backwash filter cleaning features:
a. Fully automatic recoil sewage filter adopts multiple filter cartridges for filtration, large effective filter area, small pressure loss, and the design filter area is 3 to 5 times of the import and export area.
b. Automatic recoil sewage filter repair and maintenance are convenient: setting up manholes for inspection, convenient loading and unloading of filter cartridges, and backwashing filters.
c. Fully automatic recoil sewage filter adopts the structure of multi-filter cartridge filtration and cartridge-by-filter cartridge cleaning, and it continuously supplies water when cleaning.
d. Automatic backflush sewage filter program control: According to the actual situation of the user needs to set the system’s parameters.
e. Backwashing filter Advanced control system: The control system has high precision and can adjust its working mode and running status according to different water quality to improve its ability to adapt to water quality.
F. backwash filter convenient control method: pressure difference / time control or separate control, according to actual conditions and needs of arbitrary choice, automatic operation, while setting up manual / automatic switch, control mode can be set in advance, and Electrical interlock can be achieved.
g. The backflushing filter is provided with local control. If necessary, remote transfer control switch can be set to achieve local operation and remote control operation.
h. The backwash filter retains functions such as running status output, fault alarm output, etc., to ensure that the equipment is used under the conditions of safe and reliable automatic recoil sewage filter function.
Backwash filter has strong filtration capacity, large flow rate: large flow “straight-through” filter used in large quantities in coal mines, due to structural limitations, the maximum flow can only reach 380L/min, the filter can reach 800L/min or more Big. Automatic filter, filter, full integrated water processor, electronic filter cleaning filter high precision: backwash filter has two or more sets of filter elements, large flow area, the original pressure loss is small, can Achieve high flow, high-precision filtration (25 m, 40 m), traditional filters are difficult to achieve.
Back rinsing filter quantifies the pollution degree: The filter can be equipped with pressure gauges K1 and K2 at the inflow end Pi of the liquid and the outflow end Po, and the pressure difference of P=K1-K2 quantifies the contamination of the filter. The degree of ease of cleaning at any time, the traditional filter is no secondary function.